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Technical Support

Q-Max offers spare parts and resources to support the operation of your air-operated double diaphragm (AODD). We aim to help you choose the right pump that is customised to the needs and demands of your industrial applications.

Parts Description

Q-MAX AODD Pump Materials

P – Polypropylene
K – PVDF
A – Aluminium
4 – SUS304
6 – SUS316
L – SUS316L

Replacement Parts Order Forms

Operating Temperature Guide

Diaphragm Material
Temperature limit
Viton: Excellent corrosion resistance, resistance to various acids (including the medianconcentration of oxidizing acid),alkali, salt, petroleum products, hydrocarbons, etc.
-40°​C to 177°​C
PTFE (Teflon): Excellent corrosion resistance, almost resistant to all chemical media (including concentrated nitric acid and aqua regia). Except melting of lithium, potassium.sodium, chlorine trifluoride, high-temperature oxygen trifluoride, sulfur-speed liquid fluorine.
4°​C to 176°​C
Santoprene: Good abrasion resistance, chemical resistance and heat resistance, suitable for general acid and alkali, not suitable solvent. Can replace the EPDM/EPR material.
-29°​C to 104°​C
Hytrel: Good abrasion resistance, used in most of the neutral fluid. Can replace Bune-N materials.
-29°​C to 104°​C
EPDM: Abrasion resistance, aging resistance, ozone resistance , suitable for general acid and alkali.
-40°​C to 122°​C
Buna-N: Widely used in gasoline and other oil products. Suitable for use at room temperature.
-40°​C to 100°​C
GE: Better abrasion resistance than Hytrel, the same chemical resistance as Buna-N.
-29°​C to 104°​C
Pump Body Material
Temperature limit
PP: Medium abrasion resistance, good chemical resistance, good versatility, especially for common acid-base.
-4°​C to 80°​C
POM: Good solvent resistance, abrasion resistance. Low friction, low moisture absorption.
4°​C to 176°​C
PVDF: Strong chemical resistance, crush resistance, abrasion resistance. good corrosion resistance for acid.alkali and variety of organic solvents.
-4°​C to 93°​C